An abnormal connection or passageway (or ‘channel’) between two organs or blood vessels. An anal fistula is when a small passageway is formed between the end of the bowel and the skin of the anus.
(兩個器官或血管之間異常的連接物或通道（或「管道」）。肛門瘻管為腸道未端和肛門皮膚之前形成小型通道的情況。)

目前這分類沒有任何內容